[Users] Instructions to configure Claws Mail -- help appreciated

[Pierre Fortin]

On Wed, 3 Feb 2016 01:03:28 +0100 Huey.Burton at gmx.ca wrote:

>the headers' pane above the message does not contain all the headers,

Have you clicked the Edit button in:
Configuration
  Preferences
    Message View
      Text options
        Headers (3rd row)?